I'm hoping to find the measurements for motard wheels for my '05 RR 4t 450. I want to have a completely separate set for swapping from dirt to commute on a whim, without sacrificing by using dual-sport tires. I'm just hesitant to shell out the $600 each for the ones directly from Beta in Italy.

I took mine to Woody's Wheel Works and they told me that I could either buy hubs from Beta or have carriers custom machined for one of the interchangeable hubs. The wheels from Beta turned out to be a little bit cheaper than that, but not by much. If you figure out a cross-ref, please share!